Selections from Kreigh Tomaszewski's
Rock and Mineral Collection

Someday I hope to have my entire collection posted here. Until then, I hope you enjoy what I have posted so far. Come back again as I plan to update my catalog pages monthly. Click on any image for a larger picture, and then use your browser Back button to return here.

Someday I hope to have my entire collection posted here. Until then, I hope you enjoy what I have posted so far. Come back again as I plan to update my catalog pages monthly.

this specimen may be included in the group pictures at the beginning and end of this section

Mexico

acquired 1996 (from Edmund Scientific)

Matrix

Secondary Mineral(s)

Comments

#0192

Hardness

Streak

Specific Gravity

Crystal Form

Calcite

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Canada

acquired 1996 (from Edmund Scientific)

Matrix

Secondary Mineral(s)

Comments

#0193

Hardness

Streak

Specific Gravity

Crystal Form

Calcite

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

California

acquired 1996 (from Edmund Scientific)

Matrix

Secondary Mineral(s)

Comments

#0194

Hardness

Streak

Specific Gravity

Crystal Form

Calcite

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Mexico

acquired 1996 (from Edmund Scientific)

Matrix

Secondary Mineral(s)

Comments

#0195

Hardness

Streak

Specific Gravity

Crystal Form

Chalcocite

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Clark Mine, Copper Harbor, MI

1997

Chalcopyrite, Enargite?

#0163

Cristobalite

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

California

acquired 1996 (from Edmund Scientific)

Obsidian

#0162

Hematite

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Lake Superior District

Quartz, Muscovite, Vivianite

#0164

red

botryoidal

Native Copper

Cu

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Quincy Mine, Hancock, MI

1997

Chlorite

#0160

Rose Quartz

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

South Dakota

acquired 1996 (from Edmund Scientific)

Quartz

micro fibers of dumortierite [Al3(BO3)(SiO4)3O3] give Rose Quartz its color and prevents the formation of crystals.

#0161

None (massive)

Ulexite

NaCaB5O9 8H2O

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Death Valley, California

acquired 1997

Pale green and brown bands indicate the presence of two unknown minerals in this specimen.

Named this mineral in 1850 by James Dwight Dana after George Ludwig Ulex (1811-1833), the German chemist who discovered the mineral.

Reference #0205

2 1/2

white

1.9

Acicular

Uvarovite

Ca3Cr2Si3O12

Ural Mountians, Russia

Acquired 1999 (from Fossils Inc)

may be Chromite in Peridotite

Quartz

Named after Count S.S. Uvarov by G.H. Hess in 1832. The Count (1786-1855) was President of the Academy of St. Petersburg.

#0416,#0447

6 1/2 - 7 1/2

Colorless

3.8

dodecahedron, trapezohedron

Black Rutile

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Bahia, Brazil

Acquired 1999, Pooh's Corner

Quartz

Secondary Mineral(s)

Comments

#0172

Hardness

Streak

Specific Gravity

Crystal Form

Golden Rutile in

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Bahia, Brazil

Acquired 1999, Pooh's Corner

Quartz

Quartzite?

Clear quartz with edge of matrix - rutile radiating out of matrix.

#0173

Hardness

Streak

Specific Gravity

Crystal Form

Hornblende Pyroxene Diorite

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Locality

acquired 1950s

Matrix

Secondary Mineral(s)

Comments

#0165

Hardness

Streak

Specific Gravity

Crystal Form

Quartz Sandstone

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Munising Falls, Alger County, MI

1999 by Andy Tomaszewski

Matrix

Banded with brown and yellow layers

Comments

#0168

Hardness

Streak

Specific Gravity

Crystal Form

Heulandite

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Silver Mtn., Houghton County, MI

1999 by Andy Tomaszewski

Matrix

Secondary Mineral(s)

Comments

#0167

Hardness

Streak

Specific Gravity

Crystal Form

Bornite

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Iron Bridge, Ontario, Canada

1981

Chalcopyrite

Secondary Mineral(s)

Comments

#0169

Hardness

Streak

Specific Gravity

Crystal Form

Bornite

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Iron Bridge, Ontario, Canada

1981

Chalcopyrite

Secondary Mineral(s)

Comments

#0223

Hardness

Streak

Specific Gravity

Crystal Form

Optical Quartz

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Corning Glass Works, New York

acquired early 1960s

Matrix

Secondary Mineral(s)

Comments

#0166

Hardness

Streak

Specific Gravity

Crystal Form

Native Copper

Formula

Keweenaw Peninsula

acquired 1998

Calcite

Green tint to calcite suggests malachite or other copper compound

Comments

#0171

Hardness

Streak

Specific Gravity

Crystal Form

Calcite

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

Quincy Mine, Hancock, MI

1997

Keweenaw Lava

Native Copper, Cuprite, Malachite, Chlorite, Suiderite, Quartz

I think there may be a couple more minerals in this mixed up seam edge

#0174

Hardness

Streak

Specific Gravity

Crystal Form

Lake Superior Agate

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

underwater at Lake Superior shoreline by McClain State Park, near Hancock, MI

1997

Matrix

Secondary Mineral(s)

Comments

#0221, 0222

Hardness

Streak

Specific Gravity

Crystal Form

Pencil, Mass, Selenite

CaSO4 2H2O

Alabastine mineGrand Rapids, Michigan

1988

Matrix

Secondary Mineral(s)

Probably named for the Greek word gypsos meaning plaster. Gypsum mining in Grand Rapids started in the spring of 1843 when Richard E. Butterworth uncovered a layer of it while plowing. This turned into the Grand Rapids Gypsum Co. in 1860 (and bought by Domtar Industries Inc. in 1981), which is the oldest continuously operating gypsum mine in in the world. The Alabastine mine was a competetor who's output was used to make sparkling/glittering alabastine paint.Traded to Gary Brown February 2000

Reference #0289

Hardness

Streak

Specific Gravity

Crystal Form(s)

Pencil, Mass, Honey Selenite

CaSO4 2H2O

Alabastine mineGrand Rapids, Michigan

1988

Matrix

Secondary Mineral(s)

Probably named for the Greek word gypsos meaning plaster. Gypsum mining in Grand Rapids started in the spring of 1843 when Richard E. Butterworth uncovered a layer of it while plowing. This turned into the Grand Rapids Gypsum Co. in 1860 (and bought by Domtar Industries Inc. in 1981), which is the oldest continuously operating gypsum mine in in the world. The Alabastine mine was a competetor who's output was used to make sparkling/glittering alabastine paint.Traded to Gary Brown February 2000

Reference #0289

Hardness

Streak

Specific Gravity

Crystal Form(s)

Lake Superior Agate

Formula

individual specimen picture not yet available

this specimen may be included in the group pictures at the beginning and end of this section

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